The EXP to level multiplier needs to be increased by 5.0x. It needs to take at least five times longer than it currently does to make next level. As-is, I'm halfway there and I'm not really happy about it. I'm enjoying the game immensely, but it's also "half-over" if we're going by level. I'm going to miss that level-up graphic at 50. Hopefully they planned ahead and the game will max at level 300 after several expansion packs and such.
If you multiply it by 5 where does the extra content come from? People would not like grinding womp rats for hours on end because they are not high enough to continue their story. Yet to add more story based content (the heart and soul of SWTOR) would have delayed the launch by any number of months.
So what do you want them to do?